package com.kelvin.oocl.operator;

import java.util.Comparator;
import java.util.List;
import java.util.TreeSet;

import com.kelvin.oocl.pojo.Customer;

public interface CustomerOperator {
	
	public boolean add(Customer customer);
	
	public boolean addAll(List<Customer> customers);
	
	public TreeSet<Customer> sort(Comparator<Customer> comparator); 
}
